干旱区研究

干旱区研究 ›› 2011, Vol. 27 ›› Issue (1): 31-38.

• 农业与气候资源 • 上一篇    下一篇

河西走廊荒漠-绿洲区气候环境演变特征

 高振荣1,2, 刘晓云2, 杨庆华2, 马廷德2   

    1. 中国气象局兰州干旱气象研究所，甘肃省干旱气候变化与减灾重点实验室，中国气象局干旱气候变化与减灾重点开放实验室,甘肃 兰州730020
    2. 甘肃省酒泉市气象局,甘肃 酒泉 735000
  • 发布日期:2011-09-06
  • 作者简介:高振荣（1957-），男，甘肃酒泉人，工程师，主要从事天气预报及气候分析.E-mail:gaozrong@163.com
  • 基金资助:

    干旱气象科学研究基金项目(IMA 2008-02)

ClimateEnvironmental Evolution in Desert-oasis Ecotone in the Hexi Corridor

 GAO  Zhen-Rong1,2, LIU  Xiao-Yun2, YANG  Qing-Hua2, MA  Ting-De2   

    1. Key Laboratory of Arid Climate Change and Disaster Reduction of Gansu Province, Key Laboratory of Arid Climate Change and Disaster Reduction of CMA, Institute of Arid Meteorology, China Meteorology Administration, Lanzhou 730020, China
    2. Jiuquan Meteorological Bureau, Jiuquan 735000, Gansu Province, China
  • Online:2011-09-06

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摘要： 根据河西走廊荒漠-绿洲交错区敦煌、金塔及民勤3站1960-2007年气温、降水、蒸发量等观测资料，利用距平时间序列和多阶自回归序列分析方法，探讨荒漠-绿洲交错区的年际气候演变特征。结果表明：在1960-2007年荒漠-绿洲交错区年均气温分为两个主时段 ，即1967－1986年为一低温时段，1987年开始转为一个相对较长的偏暖时段。目前，年均气温正处在历史的波峰状态，年均蒸发量显著增加。利用荒漠-绿洲交错区1980-2007年灌溉面积、地下水开采状况等资料，分析其历史演变特征，说明了在气候变暖的背景下，人类活动与环境的不相适应，大量扩耕、超采地下水是导致荒漠-绿洲交错区气候环境退化的主要原因之一。

关键词: 荒漠-绿洲, 交错区, 气候, 环境演变, 河西走廊

Abstract: Based on the air temperature, precipitation and evaporation data observed by the Dunhuang, Jinta and Minqin meteorological stations in the Hexi Corridor, Gansu Province during the period from 1960 to 2007, in this paper the climate change characteristics in desertoasis ecotones in the Hexi Corridor are researched using the anomaly time series and the multiorder autoregression series analysis. The results show that there were two stages of annual temperature change in desertoasis ecotones in the Hexi Corridor in recent 48 years from 1960 to 2007, that is, the temperature was low during the period from 1967 to 1986, but it began to increase from 1987, in which the temperature increase rates in Minqin, Jinta and Dunhuang were 0.051 ℃/a, 0.060 6 ℃/a and 0.063 8 ℃/a respectively, and the annual temperature is currently at its historical peak stage. The annual evaporation is significantly increased, thus the topsoil moisture content is decreased by 3.546%/10 a. Moreover, the change of groundwater level in desertoasis ecotones in the Hexi Corridor is also analyzed based on the data of irrigation areas and pumped groundwater volumes in the corridor during the period of 1980-2007. The results reveal that human activities, such as the enlargement of the areas under cultivation and overpumped groundwater, is one of the main causes resulting in environmental degeneration in the corridor under the background of climatic warming.

Key words: desert-oasis ecotone, climate, environmental evolution, Hexi corridor

中图分类号: 

  • P467